ADDISON W LEARNED
Engineering in Abington, MA
License number
Massachusetts 20092
Issued Date
May 21, 1965
Expiration Date
Jun 30, 2018
Type
Mechanical Engineer
Address
Address
Abington, MA 02351
Professional information
Isokinetic Snow Displacing Device
US Patent:
2008021, Sep 11, 2008
Filed:
Mar 8, 2007
Appl. No.:
11/715117
Inventors:
Addison Woodbury Learned - Abington MA, US
International Classification:
E01H 5/02
US Classification:
37265
Abstract:
A handrail article containing integral nodes continuously spaced along the axis of the rail at approximate hand spacing to reduce muscle torque strain and fatigue (Isokinetics) resulting from strength applied to overcome sliding of hand grip while sustaining balance during travel on stairways. A non-obvious application of the article is to mobile hand railings as may be found on boats, public transportation, ladders and physical rehabilitation equipment.